Auto-theft signal



J. W. MARH.

AUTO THEFT SIGNAL. APPLICATION FILED FEB.25,1920.

' Patented Aug. 17, 1920.

UNITED STATES PATENT OFFICE.

'JOHN W. MARE, OF NEWPORT BEACH, CALIFORNIA.

AUTO-THEFT SIGNAL.

To all whom it may concern.-

Be it known that 1, JOHN T. MARR, a citizen of the United States,residing at Newport Beach, in the county of Grange and State ofCalifornia, have invented new ments of the parts, an embodiment of whichinvention is illustrated in the accompanying drawings and described andclaimed herein. Figure 1 is a perspective of the portion of the tonneauof an automobile to which the theft signal is applied in combinationwith the exhaust pipe from the motor, the latter not being shown.

Fig. 2 is a transverse sectional view in a plane at right angles to theaxis of the valve device of the signal.

Fig. 8 is a section on line 3-3 of Fig. 2 in a plane at right angles tothe plane of Fig. 2.

The present invention contemplates the provision of a signal givingdevice that maybe connected to the exhaust apparatus of an internalcombustion engine of a motor driven vehicle so that the pressure of theexhaust gases can be utilized to give an audible signal.

In the accomplishment of this a valve casing or shell 2 in the form of acircular and flat disk is provided with a cylindrical chamber open atone end, and in this chamher there is fitted a rotary or oscillatingvalve disk or part 3 of hollow structure that is cut away on one side atthe chordal line 4 so as to remove .a portion of the peripheral wall 3of the valve member. This valve member is circumferentially turned tohave a snug working fit in the chamber of the shell 2 about the axis ofthe shell through one side f which extends an axial stem 5 of theadjacent end wall of opposite end wall of this valve has a flange 3overlapping the adjacent surface of the valve shell 2 and on the stem 5is provided a set of clamp nuts 6'adjustable to ,draw the valve 3 intosuitable running fit'in its shell 2.

the valve 3. The

Specification of Letters Patent. Patented Aug 17 1920.

Application filed February 25, 1920. Serial No. 361,336.

site point in the shell is an outlet connection 8 that may be attachedto the usual exhaust mufiler, not shown. Intermediately between theseconnections 7 and 8 there is provided an outlet 9 that might be termedthe cut- .out. At aposition approximately diametrically opposite thecut-out 9 the end wall of the shell 2 is provided with a port 10 towhich may be attached means for giving the audible signal desired, suchmeans comprising, for instance, a whistle 11.

When the valve 3 is thrown by a lever 13 on its stem 5 to the positionshown in Fig. -2 the annular wall 3 of the valve member 3 uncovers theinlet connection 7 and also uncovers the whistle port 10 so that thepressure of the exhaust gases can be utilized to vibrate the whistle, Ifthe lever be thrown frorr the position shown in Fig. 2 so as to engagean intermediate seat or notch 14 in a wearing plate 15 shown as mountedin the foot board F of the vehicle V, then the gases passing into thevalve parts from the connection 7 will pass out of the cut-out 9 by theregistration therewith of the coordinate cut-out port 9 providedtherefor in the annular wall 3 If it be desired to divert the exhaustgases through the valve to the muffler connection 8 then the valve lever13 is thrown over so as to engage a seat or notch 16 on the wear plate15 at which time a mufiler connection port 8 in the annular wall 3 ofthe valve will be brought into register with the mufiler connection 8.

In the operation of the device the authorized driver of the vehicle willthrow the lever 13 of the valve, during the ordinary operation or thevehicle, so as to open communication between the connections 7 and 8 byregistering the outlet port 8 with the connection 8 and the dischargewill pass into the muffler. Or, the operator can throw the lever 13 toset the valve so as to register with port 9 with the cut-out.9 inordinary operating conditions.

When the driver desires to park the car or let it remain at agivenstation he then throws the lever 13 over to the position shown in Figs.2 and 3 at whichtime it is locked as to the wear plate 15 by a padlock Pthe shackle of which is passed through an aperture 13* provided in thelever and through a complementary fixed lug 17, so

that when the englne is started with the valve in the open position, asshown, the exhaust gases will serve to give a signal through the whistledevice 11 and this whistling sound will be continued until the engine isstopped or the lever 13 shiflzed to cut off the whistle signal.

Various changes may be made without departing from the spirit of theinvention as claimed.

What is claimed is:

1. In a theft signal for motor vehicles, the combination of a circularvalve casing adapted to be attached to the exhaust outlet, a whistleattached to said casing adapted to be sounded by exhaust gases, outletsto atmosphere and to a mufiier from said casing, the said outlets andexhaust pipe connection being disposed radially about the periphery ofsaid casing, a valve revolubly mounted within said casing comprising anarcuate wall adapted to slidably contact with the inner circular surfaceof said casing, ports in said valve adapted to register with outlets insaid casing, and means to rotate said valve.

2. A theft signal for motor vehicles, the

combination of a circular valve casing adapted to be attached to theexhaust outlet, a whistle attached to the end wall of such casing andadapted to be sounded by exhaust gases, outlets to atmosphere and to amuffler from said casing, a valve revolubly mounted within the saidcasing comprising a wall having a peripheral flange, said flange adaptedto slidably contact with the inner peripheral surface of the casing,ports in said flange adapted to alternhtely register with the outlets toatmosphere and the muffler, the said valve walland flange beingtruncated on a chordal line so that when the valve ports are broughtinto registration with either of the outlets in the casing the valvewall will cover the whistle port, and when the whistle port is uncoveredby the said wall the said outlets will be covered, and means to locksaid valves in any of the covering or uncovering portions.

In testimony whereof I have signed my name ,to this specification.

' J. W. MARE.

